LMV791MK Equivalent & Substitute Parts

Part Overview

The LMV791MK is a general-purpose operational amplifier manufactured by Texas Instruments, housed in a SOT-23-6 Thin package. This device features rail-to-rail output capability and is designed for low-power applications requiring single-supply operation across a 1.8 V to 5.5 V supply range.

The LMV791MK carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications currently utilizing this component.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Slew Rate	11.5	V/µs
Gain Bandwidth Product	17	MHz
Current - Input Bias	0.1	pA
Voltage - Input Offset	100	µV
Current - Supply	1.15	mA
Current - Output / Channel	60	mA
Voltage - Supply Span (Min)	1.8	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature Range	-40 to 125	°C
Package / Case	SOT-23-6 Thin, TSOT-23-6	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution eligibility for the LMV791MK is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Amplifier type classification (General Purpose)
Number of circuits (1)
Output configuration (Rail-to-Rail)
Slew rate (11.5 V/µs)
Gain bandwidth product (17 MHz)
Input bias current (0.1 pA)
Input offset voltage (100 µV)
Supply current (1.15 mA)
Output current per channel (60 mA)
Supply voltage range (1.8 V to 5.5 V)
Operating temperature range (-40°C to 125°C)

Mechanical Specifications:

Package type (SOT-23-6 Thin / TSOT-23-6)
Mounting technology (Surface Mount)

The substitute part LMV791MK/NOPB maintains identical electrical and mechanical specifications to the main part number, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Parameter	LMV791MK	LMV791MK/NOPB	Match
Manufacturer	Texas Instruments	Texas Instruments	✓
Amplifier Type	General Purpose	General Purpose	✓
Number of Circuits	1	1	✓
Output Type	Rail-to-Rail	Rail-to-Rail	✓
Slew Rate (V/µs)	11.5	11.5	✓
Gain Bandwidth Product (MHz)	17	17	✓
Current - Input Bias (pA)	0.1	0.1	✓
Voltage - Input Offset (µV)	100	100	✓
Current - Supply (mA)	1.15	1.15	✓
Current - Output / Channel (mA)	60	60	✓
Voltage - Supply Span Min (V)	1.8	1.8	✓
Voltage - Supply Span Max (V)	5.5	5.5	✓
Operating Temperature (°C)	-40 to 125	-40 to 125	✓
Package / Case	SOT-23-6 Thin, TSOT-23-6	SOT-23-6 Thin, TSOT-23-6	✓
Mounting Type	Surface Mount	Surface Mount	✓
Product Status	Obsolete	Active	—
RoHS Status	RoHS non-compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

LMV791MK/NOPB is the direct substitute for LMV791MK. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility.

The primary distinction between these part numbers is product status and regulatory compliance:

LMV791MK is classified as obsolete, indicating discontinued manufacturing and limited availability.
LMV791MK/NOPB maintains active product status with current manufacturing support and significantly higher inventory availability (17,200 pieces versus 2,400 pieces).

Additionally, LMV791MK/NOPB carries ROHS3 compliance certification, whereas the original LMV791MK is RoHS non-compliant. This compliance difference may be relevant for applications subject to environmental or regulatory requirements.

For new designs or production continuity, LMV791MK/NOPB is the appropriate selection due to active product status and regulatory compliance. Existing designs using LMV791MK require no circuit modifications when transitioning to LMV791MK/NOPB.

Frequently Asked Questions (FAQ)

Q: Can LMV791MK/NOPB be used as a direct replacement for LMV791MK?

A: Yes. LMV791MK/NOPB is electrically and mechanically identical to LMV791MK. All electrical parameters, pin configuration, and package specifications are equivalent. No circuit modifications are required.

Q: What is the difference between LMV791MK and LMV791MK/NOPB?

A: The primary differences are product status and compliance certification. LMV791MK is obsolete with limited inventory. LMV791MK/NOPB is an active product with higher availability and ROHS3 compliance. Electrical and mechanical specifications are identical.

Q: Why is LMV791MK marked as obsolete?

A: Obsolete status indicates that Texas Instruments has discontinued manufacturing of this specific part number variant. LMV791MK/NOPB represents the current active equivalent from the same manufacturer.

Q: Are there any pin configuration differences between these parts?

A: No. Both parts use the SOT-23-6 Thin package with identical pin assignments and functionality.

Q: What does the "/NOPB" suffix indicate?

A: The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free) in compliance with RoHS3 regulations. This is a packaging and compliance designation, not a functional difference.

Q: Can I use LMV791MK/NOPB in applications originally designed for LMV791MK?

A: Yes. All electrical specifications, operating ranges, and performance characteristics are identical. LMV791MK/NOPB is fully compatible with existing circuit designs.

Q: What is the supply voltage range for these parts?

A: Both parts operate across a supply voltage range of 1.8 V to 5.5 V, supporting single-supply applications in low-power systems.

Q: What is the operating temperature range?

A: Both parts operate across -40°C to 125°C, suitable for industrial and extended-temperature applications.

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